Exam AWS Certified Data Engineer - Associate DEA-C01 topic 1 question 198 discussion

select count (*) as TotalEvents, eventname, errorcode, errormessage from cloudtrail_logs where errorcode is not null and eventtime >= '2024-01-01T00:00:00Z' group by eventname, errorcode, errormessage order by TotalEvents desc limit 10;

Why Option A is Correct? ✅ WHERE errorcode IS NOT NULL → Filters out successful events, keeping only errors. ✅ AND eventtime >= '2024-01-01T00:00:00Z' → Ensures only logs from 2024 are considered. ✅ GROUP BY eventname, errorcode, errormessage → Aggregates error occurrences per event. ✅ ORDER BY TotalEvents DESC → Sorts by the number of occurrences, ensuring the most frequent errors appear first. ✅ LIMIT 10 → Returns only the 10 most recent errors.

A. Same as B but including filter for error code being set

Query in the Option B is correct with 'desc' order

This is not the same, but it shows the important point. Descending order is the correct answer. SELECT * FROM cloudtrail_logs WHERE eventTime >= '2024-01-01' AND errorCode IS NOT NULL ORDER BY eventTime DESC LIMIT 10;